CASSINI In Space

 

Helix Nebula Banner Image
GALILEO

The Galileo Energetic Particles Detector

 

Galileo EPD Handbook

 

Chapter 1. Instrument Summary

 

TABLE 6. CMS CHANNEL DESCRIPTION

 

Channel
Name
Species  Energy Range
(MeV)
Logic
Old design (pre-Challenger), later eliminated
CE1 Electrons 0.050-0.100 (JaP1) (JcP) KE1 (K0) (L0)
CE2   0.100-0.200 (JaP1) (JcP) K0 (KE2) (L0)
CE3   200>0.300 (JaP1) (JcP) KE2 (K1)
CP1 Protons 0.200-0.290 JaP1 (JaP2) (K0)
CP2   0.290-0.500 + JaP2 (Ja0) (K0)
CP3   0.05-1.4 JaP1 (Ja0) K0 (K1) (L0)
CA0 Jc Channels (Alphas) 0.08-0.19 + Jc0 (Jcl) (K0)
CA2**   0.19-0.45 Jc0 (Jc1) K1 (L0) T1 (T2)
CM0 Jc Channels (Medium) 0.08-0.15 + Jc1 (Jc3) (K0)
CM2**   0.14-0.59 Jc1 (Jc3) K0 (K3) (L0) T2
CH0 Jc Channels (Heavy) 0.025-0.035 + Jc3 (Jc4) (K0)
CH2**   0.11-0.37 [Jc3 or {T3 and Jc1}] (Jc4) K0 (K3) (L0)
JcS Jc & L Singles   Jc0
LS     L0
New channels, replacing the above eliminated channels; TOF x E;  geometrical factor: 0.007 cm2 sr
TP1 Protons 0.08-0.22  
TP2   0.22-0.54  
TP3   0.54-1.25  
TA1 Alphas 0.027-0.155  
TA2   0.155-1.00  
TO1 Medium Nuclei (CNO) 0.012-0.026  
TO2   0.026-0.051  
TO3   0.051-0.112  
TO4   0.112-0.562  
TS1 Intermediate Nuclei (S) 0.016-0.030  
TS2   0.030-0.062  
TS3   0.062-0.31  
TH1‡ Heavy Nuclei (Fe) 0.02-0.20  
TACS‡ New TOF Sensor Singles    
STARTS‡      
KtS‡      
Delta E x E (old design channels--no change);  geometrical factor for Ja channels - 0.008 cm2 sr; geometrical factor for Jb channels - 0.025 cm2 sr  (Col. 3 below from "instrument paper.")
CA1  Alphas 0.17-0.49 Ja0 (Ja1) (K0)
CA3**   0.49-0.68 Ja0 (Ja1)K0 (K2) (L0) T1 (T2)
CA4**   0.68-1.4 Ja0 (Ja1)K2 (K5) (L0)
CM1  Medium Nuclei (O) 0.16-0.55 Ja1 (Ja3)(K0)
CM3**   0.55-1.1 Ja1 (Ja3) K0(K4) (L0) T2
CM4**   1.1-2.9 Ja1 (Ja3) (S1)K4 (K5) (L0)
CM5**   2.9-10.7 Ja0(S1) K5 (L0)
CN0** Intermediate Nuclei (Na) 1.0-2.2 [S1 or Ja3] (Ja4)K4 (K5) (L0)
CN1**   2.2-11.7 S1 (S2)K5 (K6) (L0)
CH1 Heavy Nuclei (Fe) 0.22-0.33 Ja3 (Ja5) (K0)
CH3**    0.33-0.67 Ja3 (Ja5) K0 (K4) (L0) T3
CH4**   0.67-1.3 Ja4 (Ja5) K4 (K5) (L0)
CH5   1.3-15.0 S2 (Ja5) K5 (L0)
JaS Singles Rates   Ja0 JbS Ja0 JcS Jc0 KS K0 LSL0
JbS          
KS      

 

NOTES:
All underlined channels are in the main array.
+ High energy limit will be greater for the 180 end, when Detector K does not provide a reliable anticoincidence cut-off. Single parameter channels.
** An event in these channels may also be transmitted as a CMS PHA event.
‡ These channels are read out every 8/3 seconds.  All other CMS channels are read out every 4/3 seconds.

 

 

Next: Post-Challenger Revisions: Hardware Changes

 

Return to the CMS Subsystem Index

Return to Galileo EPD Handbook Table of Contents Page.

Return to main Galileo Table of Contents Page.
Return to 
Fundamental Technologies Home Page.

 


Updated 8/23/19, Cameron Crane

QUICK FACTS

Manufacturer: The Galileo Spacecraft was manufactured by the Jet Propulsion Laboratory, Messerschmitt-Bölkow-Blohm, General Electric, and the Hughes Aircraft Company.

Mission Duration: Galileo was planned to have a mission duration of around 8 years, but was kept in operation for 13 years, 11 months, and 3 days, until it was destroyed in a controlled impact with Jupiter on September 21, 2003.

Destination: Galileo's destination was Jupiter and its moons, which it orbitted for 7 years, 9 months, and 13 days.